废报纸纤维制备微晶纤维素的工艺研究

Preparation of Microcrystalline Cellulose from Waste Newspaper Fiber

以预处理的废报纸为原料,在一定条件下进行盐酸水解改性研究,考察了液料比、浓度、时间、温度对废报纸盐酸水解纤维素程度的影响,并采用正交试验法优化了反应工艺条件。研究结果表明,在温度80℃、水解时间1h、盐酸质量分数为6wt%、液料比为1:15时,微晶纤维素的得率最高可达88.65%。

The pretreated waste newspaper is used as raw material for the hydrochloric acid hydrolysis under certain conditions, the effects of liquid-to-solid ratio, hydrochloric acid concentration, time and temperature on the degree of hydrochloric acid hydrolysis of cellulose waste newspaper are studied in the present paper. The orthogonal test is adopted to optimize the reaction conditions. The results show that the yield of microcrystalline cellulose is up to 88.65% when the temperature reaches 80℃, the hydrolysis time is 1 H, the hydrochloric acid mass fraction is 6 wt%and the liquid-to-solid ratio is 1：15.